Structural and photoluminescence investigations of Sm3+ doped BaY2ZnO5 nanophosphors

Designing of emerald terbium (III) ions with β‐ketocarboxylic acid and heterocyclic ancillary ligands for biological and optoelectronic applications

“…5 D 2 ), which was attributed to the π-π* transition centred at the ligand. [27] Photoluminescence emission spectra were investigated in the 400-700 nm wavelength range under 353 nm excitation wavelengths as manifested in Figure 6(b). Four characteristic emission peaks at 490 nm, 545 nm, 582 nm and 621 nm were observed due to the electronic transition of 5 D 4 !…”

Photoluminescence, cathodoluminescence and thermal stability of Sm3+‐activated Sr3La(VO4)3 red‐emitting phosphors

“…As depicted in Figure (black line), the PLE spectrum monitored by 599 nm emission ( 4 G 5/2 → 6 H 7/2 ) of Sm 3+ ions consisted of a broad band accompanied by a series of sharp peaks. The broad band from 220 to 350 nm centered at 320 nm was the so‐called charge transfer (CT) band, corresponding to the allowed transition with 1 A 1 → 1 T 1 of the VO 4 3− group, while these narrow bands located at approximately 359 nm ( 6 H 5/2→ 4 D 3/2 ), 372 nm ( 6 H 5/2→ 4 P 7/2 ), 402 nm ( 6 H 5/2→ 4 L 13/2 ), 437 nm ( 6 H 5/2→ 4 G 9/2 ) and 472 nm ( 6 H 5/2→ 4 I 11/2 ) were assigned to the typical 4 f –4 f transitions of Sm 3+ ions . Clearly, compared with those of other excitation bands, the excitation band at 402 nm exhibited the strongest intensity, indicating that the obtained samples can be efficiently pumped by NUV light.…”

Single phase cool white light emitting novel Ca9Al(PO4)7:Dy3+ nanophosphor under NUV excitation

“…Nowadays, nano-scaled crystalline materials like rare-earth-doped luminescent nanophosphors are considered as the future generation lighting sources and components of future technology due to their unique features such as low power consumption, high energy efficiency, and long service life over the bulk materials [1][2][3][4][5][6][7]. Also, the nano size of particles reduces the non-radiative process and thus, increase the quantum efficiency [8,9]. These nanophosphors have major importance in the plasma display panel, field emission display, scintillations, solid-state laser, and white light-emitting diodes (WLEDs) [10][11][12].…”

“…The author has attempted to synthesize novel Ca9Al(PO4)7:Dy 3+ nanophosphor by the solution combustion route at 1100 ˚C . This method has numerous advantages over other traditional methods such as low temperature, less time consuming, and gives the homogeneous product [9,31]. X-ray diffraction (XRD) analysis was used to examine the purity of fabricated samples.…”